EV vehicle driving sound control system and control method

Abstract

An EV driving sound control system may include a sound output device of generating a driving sound of an EV vehicle; a torque measurement sensor of measuring a torque of a motor in the EV vehicle; an indoor noise measurement sensor of detecting a noise of the EV vehicle; and a signal processing controller for controlling the sound output device to reach a target tone by receiving signals from the torque measurement sensor and the indoor noise measurement sensor, wherein the signal processing controller extracts and outputs only the acceleration feeling sound component from an engine sound upon acceleration, and masks high-frequency noise upon deceleration by the sound output device, by use of the traveling information related to the EV vehicle inputted from the CAN communication in real time and the signals inputted from the indoor noise measurement sensor and the torque measurement sensor.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to Korean Patent Application No. 10-2018-0156340, filed on Dec. 6, 2018, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE PRESENT INVENTIONField of the Invention[0002]The present invention relates to an EV driving sound control system and a control method, and more particularly, to an EV driving sound control system and a control method using a motor torque or a power performance change value of an EV vehicle.Description of Related Art[0003]Today, vehicle technology has come to apply a drive motor instead of an internal combustion engine as a power source.[0004]Since an EV vehicle accelerates by use of the motor, unlike the engine torque curve of the internal combustion engine, powerful torque is poured from the beginning of acceleration.[0005]In some EV vehicles, early acceleration is superior to that of a high displacement internal combustion ...

AI Technical Summary

Benefits of technology

This patent describes a method to control the engine sound of an electric vehicle (EV) in real-time using the motor's torque value or power change, to simulate the acceleration of a traditional internal combustion engine (ICE) vehicle. Additionally, the patent describes a technique to reduce the high frequency noise generated during deceleration of the EV by masking the noise in order to provide a better driving experience.

Problems solved by technology

This is because it is impossible for the EV vehicle to obtain an exciting engine sound like the internal combustion engine from a motor due to its characteristics.

However, in such a manner, there is a limit to feel the sense of acceleration like the internal combustion engine vehicle because the driver hears an artificial sound which is not a natural engine tone corresponding to the internal combustion engine.

Furthermore, regenerative braking is applied to the EV vehicle upon deceleration, and at the present time, a high frequency noise is generated.

This may be removed because it makes the driver feel uncomfortable.

However, there has been a problem that the conventional EV vehicle is left without removing such high-frequency noise.

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